max10 adc sample point

[Altera_Forum]

hi everyone: 

i try to use max10 on chip adc to sample a image sensor output. the frequence is 1MHz.  i need to know when the max10 on chip adc switch from sample to the hold mode. in most adc, this is controlled by the CONVST signal.      acctually i can test the sample point by   1.applying a 1MHz sin signal to the adc input,   2.set the adc sample frequence to 1MHz, the adc will generate a valid signal every 1μs  3.put the sin signal and the adc valid signal on the oscilloscope  4.figure out the relationship between valid signal and the sample point.      the problem is :  1. i can not get the precise result  2. i can not make sure every max10 has the same result  but i still want to find the relationship between valid signal and the sample point on manual.

[Altera_Forum]

i use my method to test the sampe point on MAX10_10M08_Evaluation_Kit, 

the result shows in sample_point.jpg    be careful, it is 5*clock_clk not 5* adc_pll_clock_clk!   the test condition is: 1. only use adc channel 1 2. 1MHz speed  as follows: http://www.alteraforum.com/forum/attachment.php?attachmentid=12960&stc=1   http://www.alteraforum.com/forum/attachment.php?attachmentid=12961&stc=1

[Altera_Forum]

almost 15 months passed, i still do not find the answer. 

i check the latest adc user guide(20171215), no describtion about the adc sampling point.

[Altera_Forum]

i some one find the answer, please share me. 

thanks!